Thomas Enqvist was the defending champion but lost in the first round to Raemon Sluiter.

Roger Federer won in the final 6–2, 7–6^(8–6) against Jonas Björkman.

	Semifinals							Final
	1	Roger Federer	77	6
		Karol Kučera	65	3
								1	Roger Federer	6	78
									Jonas Björkman	2	66
		Jonas Björkman	w/o
		Nicolas Escudé

	First round							Second round							Quarterfinals							Semifinals
	1	R Federer	77	0
		I Ljubičić	63	0r				1	R Federer	6	6
		J Nieminen	6	4	77				J Nieminen	3	3
		R Štěpánek	2	6	61										1	R Federer	6	4	6
		R Sluiter	77	78												R Sluiter	4	6	4
		T Enqvist	64	66					R Sluiter	7	61	6
	Q	C Saulnier	2	6	6			Q	C Saulnier	5	77	2
	7	F Santoro	6	4	1																	1	R Federer	77	6
	3	S Grosjean	6	6																			K Kučera	65	3
	Q	Á Calatrava	2	1				3	S Grosjean	64	1
		M Kratochvil	6	4	1r				K Kučera	77	6
		K Kučera	3	6	4											K Kučera	6	6
	WC	R Gasquet	64	6	6											O Rochus	3	3
		F López	77	4	4			WC	R Gasquet	77	0r
		O Rochus	77	6					O Rochus	61	5
	WC/6	Y Kafelnikov	65	4

	First round							Second round							Quarterfinals							Semifinals
	WC/5	Y El Aynaoui	2	4
		J Björkman	6	6					J Björkman	78	66	6
		W Arthurs	4	64					A Voinea	66	78	3
		A Voinea	6	77												J Björkman	79	6
		D Hrbatý	6	6												D Hrbatý	67	4
	Q	H Arazi	1	3					D Hrbatý	6	6
		O Mutis	6	2	7				O Mutis	3	4
	LL	C Vinck	4	6	5																		J Björkman	w/o
	8	T Robredo	66	6	65																		N Escudé
		M Mirnyi	78	1	77				M Mirnyi	65	2
	Q	R Cadart	6	6				Q	R Cadart	77	6
		I Labadze	4	3											Q	R Cadart	5	3
		A Dupuis	77	4	4											N Escudé	7	6
		M Ančić	64	6	6				M Ančić	2	6	610
		N Escudé	6	6					N Escudé	6	3	712
	2	J Novák	2	1

• 2003 Open 13 Singles draw
• 2003 Open 13 Qualifying draw